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Ok, a bit late writing this part 4. I completed the assembly during the week-end with the help of Justin (my second boy):

The next step was the wiring, and man a Prusa design has a lot of wires ! ElectronicGeek, you should really beef-up the documentation regarding how and where to run the cables.
During assembly I had done one mistake in the orientation of the Z motors. The cables have to go out the back:
With the kit comes a nice cable management plastic wrap. There is more than enough but I went overboard and used some of the same stuff that I already had handy. This cable wrap is pretty inexpensive and easy to install (even for a guy that sucks at cable management like me):

Now an other piece of advise for the EG folks. I would suggest that you install crimped terminals on the side of the wires that go to the power supply. Makes for a much more solid connection to the screw terminals:

I only had ring type terminal available but what you want is what they call "spad" term…

Well, spend some time starting the assembly last night. Went up to step 4 of 24.

My first iritant was the hardware kit. All screws, nuts and small metal parts in 2 bags.

Sorting them out took a good 10m. Would be a plus if they come in separate labeled bags. I guess it's would cost more, but I see that it could be a barrier for some.

I did not count all parts but the ones I counted seemed exact with some spares. I did have one part that I could not identify:

Next I started on the assembly.... Second irritant, the acrylic parts are not labeled which in some cases makes you wonder if you are assembling the right parts as the assembly guide uses CAD drawing.

Putting ID on each parts (like IKEA) would be a big bonus. Also when assembling the motors there is no note in the assembly guide to which side you should put the wires which may make the wiring a mess if you don't think ahead.
Now the acrylic come with protective wrap glued to both side of the parts. These are a pain in the …